n, m = map(int, input().split())
a = n * m

if a < 4:
    print(0)
else:
    mod = a % 4
    n_even = (n % 2 == 0)
    m_even = (m % 2 == 0)
    
    if n_even and m_even:
        print(0)
    elif not n_even and not m_even:
        if mod == 3:
            print(2)
        else:
            print(0)
    else:
        if mod == 2:
            print(2)
        else:
            print(0)